“You shall love the convert.” (Deuteronomy 10:19).
“You must understand the feelings of the convert.” (Exodus 23:9).
“When a proselyte comes to be converted, one receives him with an open hand so as to bring him under the wings of the Divine Presence.” (Leviticus Rabbah 2:9).
“Dearer to G-d than all of the Israelites who stood at Mount Sinai is the convert. Had the Israelites not witnessed the lightning, thunder, and quaking mountain, and had they not heard the sounds of the Shofar, they would not have accepted the Torah. But the convert, who did not see or hear any of these things, surrendered to G-d and accepted the yoke of heaven. Can anyone be dearer to G-d than such a person?” – Tanhuma (ed. Buber), Lekh Lekha 6:32.
“Beloved are proselytes by G-d, for the Bible everywhere uses the same epithet of them as of Israel” (Talmud, Gerim 4:3).
“Wherever you go, I will go. Wherever you lodge, I will lodge. Your people shall be my people, and your G-d my G-d. Where you die, I will die, and there I will be buried” – Ruth, a Moabite who chose to convert to Judaism. King David was in a direct line of descent from her.
Talmudic Rabbi Eliezar ben Pedat said that the exile of (Israelites) from Israel, the most terrible event in ancient Jewish history, had but one positive outcome, that “the holy one, praised be he, exiled Israel, among the nations for the purpose of gaining converts” (Pesachim 87B) (Source ).